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航空術(shù)語詞典Dictionary of Aeronautical Terms 中

時間：2011-03-11 23:13來源：藍天飛行翻譯 作者：admin 點擊：次


Flameout approaches terminate in the type of approach requested by the pilot (normally full stop).
flame resistant. 14 CFR Part 1: “Not susceptible to combustion to the point of propagating a flame, beyond safe limits, after the ignition source is removed.”
flame spraying. A process in which molten metal is deposited on a surface. A wire of the metal to be deposited is fed into an oxy-acetylene flame and melted. The molten metal is blown by a stream of high-pressure air onto the surface to be coated.
Pure aluminum can be sprayed onto steel to prevent corrosion, and metal can be sprayed onto an insulating material to make the surface electrically conductive.
flame tubes (turbine engine component). Small-diameter metal tubes that connect can-type combustors to carry the ignition flame to all of the combustion chambers.
flammable. Easily ignited. Flammable replaces the older term inflammable which can be misinterpreted to mean not flammable. 14 CFR Part 1: “With respect to a fluid or gas, means susceptible to igniting readily or to exploding.”
flammable liquid. A liquid that gives off combustible vapors (vapors that are easily ignited). Gasoline is an example of a flammable liquid.
flange. A ridge that protrudes from a device and is used for attaching something to the device, or for connecting two objects together. The propeller shaft of most modern aircraft engines is fitted with a flange on which the propeller mounts.
The end of the propeller shaft is formed into a flat plate (the flange) whose face is perpendicular the propeller shaft. The propeller is held on this flange with high-strength steel bolts.

flap (helicopter rotor blade movement). Up-and-down movement of the tip of a helicopter rotor blade.
flaperon (aircraft control). Controls used on some swept wing airplanes that serve as both ailerons and wing flaps. The flaperons on both wings can be lowered together to increase the lift and drag of the wings. This is the flap function. The flaperons can also be moved differentially: one moves up, while the other moves down. This is the aileron function.
flap extended speed. 14 CFR Part 1: “The highest speed permissible with wing flaps in a prescribed extended position.”
flap overload valve. A valve in the flap system of an airplane that prevents the flaps being lowered at an airspeed which could cause structural damage. If the pilot tries to extend the flaps when the airspeed is too high, the opposition caused by the airflow will open the overload valve and return the fluid to the reservoir.
flapper valve. A form of hinged check valve that allows fluid to flow through it in one direction only. Fluid can flow in the direction which forces the valve off its seat, but it cannot flow in the direction which forces the flapper against its seat.
flapping (helicopter rotor blade). The vertical movement of a helicopter rotor blade about its delta, or flapping, hinge.
flapping hinge (helicopter rotor). The hinge with its axis parallel to the rotor plane of rotation.

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